<template>
  <div class="spec-preview">
    <img :src="skuInfo.skuDefaultImg" />
    <div class="event" @mousemove="move"></div>
    <div class="big">
      <img :style="{left: `${left *-2}px`,top: `${top *-2}px`}" :src="skuInfo.skuDefaultImg" />
    </div>
    <div class="mask" :style="{left: `${left}px`,top: `${top}px`}"></div>
  </div>
</template>

<script>
import { mapGetters } from 'vuex';

  export default {
    name: "Zoom",
    data(){
      return {
          left:0,
          top:0,
      }
    },
    computed:{
      ...mapGetters('detail',['skuInfo'])
    },
    methods:{
      move(e){
        let x = e.offsetX
        let y = e.offsetY
        this.left = x -100
        this.top = y -100
        // console.log(this.left,this.top);
        if(this.left<=0){
          this.left = 0
        }
        if(this.left>= 200){
          this.left = 200
        }

        if(this.top<= 0){
          this.top = 0
        }
        if(this.top>= 200){
          this.top = 200
        }
      }
    }
  }
</script>

<style lang="less">
  .spec-preview {
    position: relative;
    width: 400px;
    height: 400px;
    border: 1px solid #ccc;

    img {
      width: 100%;
      height: 100%;
    }

    .event {
      width: 100%;
      height: 100%;
      position: absolute;
      top: 0;
      left: 0;
      z-index: 998;
    }

    .mask {
      width: 50%;
      height: 50%;
      background-color: rgba(0, 255, 0, 0.3);
      position: absolute;
      
      display: none;
    }

    .big {
      width: 100%;
      height: 100%;
      position: absolute;
      top: -1px;
      left: 115%;
      border: 1px solid #aaa;
      overflow: hidden;
      z-index: 998;
      display: none;
      background: white;

      img {
        width: 200%;
        max-width: 200%;
        height: 200%;
        position: absolute;
        // left: 0;
        // top: 0;
      }
    }

    .event:hover~.mask,
    .event:hover~.big {
      display: block;
    }
  }
</style>